Pet water fountain



FIG. 1 is a front, top, and right side perspective view of a pet water fountain, showing my new design;

FIG. 2 is a rear, bottom and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the pet water fountain that form no part of the claimed design. 

CLAIM The ornamental design for a pet water fountain, as shown and described. 